译码器74HC138的使能端取值为 时,处于允许译码状态。http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/c882af144af64960ad24af51f7a1b7c3.png
举一反三
- 译码器74HC138的使能端取值为 时,处于允许译码状态。http:...ad24af51f7a1b7c3.png
- 译码器74HC138的使能端[img=68x28]18031859e0ce6f6.png[/img]取值为( )时,处于允许译码状态。 A: 011 B: 100 C: 101 D: 010
- 译码器74LS138的使能端取值为______ 时,译码器处于正常译码状态。
- 译码器74HC138的使能端取值为时,处于禁止译码状态。 A: 011 B: 100 C: 101 D: 010
- 理想运算放大器的主要特征为 A: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/8ec216c374814f48ad60b00627bee3d6.png" /> B: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/b36e9dfc39a748b1b652e9b3c1a762ed.png" /> C: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/2a93dfdbeb804030ac0da51eed08943e.png" /> D: <img src="http://image.zhihuishu.com/zhs/onlineexam/ueditor/201904/a01ee7baba84489f886c43cc5d5c5169.png" />